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Thread: vibration

  1. #1
    Junior Member SHOW GUEST
    Join Date
    Jun 2007
    boise idaho


    how much vibration can be expected from a sbc 400 with solid eng. and tranny mounts. ive been told its normal for the 400 sbc to have vibration and running solid mounts and a torque strap i can expect a lot of how do we/i measure the amount of vibration there is? what is a lot and what is too much? any help or ideas on how to measure this would be appreciated

  2. #2
    Senior Member RACING JUNKIE mytmouz's Avatar
    Join Date
    May 2006
    Pelahatchie, MS
    If you have solid engine mounts, you need to use a poly tranny mount. It'll break the tranny most likely. You're vibration problem will reduce a good bit also...
    If you think nobody cares, try missing a payment...

  3. #3
    Senior Member RACING JUNKIE jmarksdragster's Avatar
    Join Date
    Jul 2007
    DO NOT EVER USE A SOLID TRANS MOUNT, especially with solid motor mounts. You will break the trans case at some point. You have no more vibration from a 400 than any other SB if it is correctly balanced. Even full tube chassis cars have some flex, most of those use front motor plates and a mid plate. A factory chassis flexes more than you can imagine and even with a roll cage and subframe connectors if needed, it will flex enough to break parts.
    Mark Whitener

    Good work isn't cheap, and cheap work can't be good.

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